Pitman.



W 4APILIOATI PITMAN 0N FILED DEO Patent ed Jan w IIIIIIIIIIIIIIIIW @WMVITA/@SES WILLIAM PATERSON, OF TORONTO, ONTARIO, CANADA.

PITIVIAN.

To all whom it 'may concern:

Be it known that I, WILLIAM PiyrnRsoN, of the city of Toronto, in thecounty of York, in the Province of Ontario, Canada, pattern-maker,having invented certain new and useful Improvements in Pitmen, do herebydeclare that the following is a full, clear, and exact description ofthe same.

My invention relates to improvements in pitmen, and the object of myinvention is to provide simple and effective means of locking andreleasing the ball retaining socket. I attain this object by themechanism illustrated in the accompanying drawings, in which Figure l,is a perspective view of pitman, showing ball retaining socket locked.Fig. 2 is a perspective view of pitman showing ball retaining` socketreleased. Fig. 3 ,is a side elevation of a section of pitman showinglocking mechanism.

In the drawings like letters of reference indicate corresponding partsin each igure.

A, is the main arm of the pitman.

13, is the ball socket section forming part of the main arm A 0, is aball socket section pivoted to the main arm A at 64, and designed toswing back to release the ball.

D is a luO extending out from the ball socket section i C designed tobear against the wedge shaped surface e of the pivoted cam E. rIhe cam Ewhich is pivoted to the main arm A by means of a bolt F, is made withsmall ratchet teeth, f. A fiat spring steel dog, G, secured to anextending lug I-I on the main frame A engages the ratchet teeth 70, andlocks the cam E in position. A ratchet thumb nut J on the bolt F,securely locks the cam E in any desired position, to the main frame A. Alat spring steel dog K secured to an extending lug L on the main frameA, engages the teeth lo of the ratchet thumb nut J securely lockingsame. An ,eccentric lever M pivoted to the main arm A, is designed torelease the flat spring steel dogs and K.

To release the ball from the pitman, the

Specification of Letters Patent.

Application led December 11, 1908.

Patented Jan. 25, 1910.

serial No. 467,037.

eccentric lever M is raised. This releases the spring steel dogs, G andIQ from the ratchet teeth /"and 70, permitting the ratchet thumb nut Jto be unscrewed. rFhis will allow the pivoted cam E to swing back,releasing the wedge shaped surface e from the extending lug D. Thepivoted ball socket section C swings back, releasing the ball.

That I claim as my invention is l. In a pitman connection, thecombination of a frame, a movable socket section pivotally secured tothe frame, a pivoted cam mounted to turn on the frame for engagementwith the movable socket section, a clamping means for holding the cam inplace, members for retaining the cam and said clamping means in workingrelation with the movable socket section, and manually operated meansfor raising or lowering the members into or out of engagement with thepivoted cam and the said clamping means.

2. In a pitman connection, the combination of a frame, a pivoted ballsocket section, a cam wedge having ratchet teeth thereon, a thumb nutprovided with ratchet teeth, pawl members arranged to engage the teethon the cam wedge and thumb nut, and manually operated means for raisingor lowering the pawl members into or out of engagement with the ratchetteeth on the said cam wedge and thumb nut.

3. In a pitman connection, the combination of a frame, a movable socketsection mounted to turn thereon, a pivoted ratchet cam mounted to turnon the frame for engagement with the movable socket section, a clampingmeans for holding the cam in place, means for retaining the ratchet camand clamping means in working relation with the movable socket section,and a manually controlled cam lever cooperating with the members forraising and lowering them into or out of engagement with the pivotedratchet cam and the said clamping means.

WILLIAM PATERSON.

Witnesses:

E. MERNER, D. S. TovuLL.

